Hello!
I am trying to figure out if I should be inviting my friends siblings. For example, one of my best friends from high school has a brother and a sister. I plan to invite the best friend and her parents, but I don't know if it would be inappropriate to not invite her siblings. I know who they are, they know me, but we never hung out and I honestly don't even think they would want to go. Also my other best friend has a brother, who my sister dislikes and I don't know that well either, but I am inviting her parents and her of course, would it be rude to not include her brother??